title: A bulky silyl shift-directed synthesis of a silyl-linked amidinate-amidine and its Zr(IV) complex.
abstract: A novel silyl-linked amidinate-amidine monoanionic ligand 3 was synthesized by double additions of PhCN starting from silyl-linked bis(amino) monoanion 2, which underwent an intramolecular Li/H metathesis and double silyl shift. The related Zr(IV) complex 4 was prepared and confirmed by X-ray diffraction revealing a structural rearrangement from its precursor. The mechanisms for the reaction processes have been proposed. Each of compounds 2, 3 and 4 was characterized by NMR spectroscopy, elemental analysis and X-ray diffraction. Complex 4 exhibited moderate activity for ethylene polymerization in the presence of methylalumoxane (MAO).
authors.affiliation: Institute of Applied Chemistry, Shanxi University, Tiayuan, 030006, China.
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Tong
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Sheng-Di
authors.initials: SD
authors.lastname: Bai
authors.forename: Shi-Fang
authors.initials: SF
authors.lastname: Yuan
authors.forename: Jian-Bin
authors.initials: JB
authors.lastname: Chao
authors.forename: Shuping
authors.initials: S
authors.lastname: Huang
authors.forename: Dian-Sheng
authors.initials: DS
authors.lastname: Liu